Ability to adjust the card size on kanban board

It would be great to have the ability to adjust the size of the cards on a kanban board, if you have a board with a lot of buckets (e.g. opportunities with 6+ stages) then they quite quickly take up all the screen space and enable the dreaded horizontal scrollbar. It would be great to have some generic sizes to choose from (xs, small, normal, large, etc.) which restrict the width of the cards.